Hydrapak Ultraflask+ 500Ml - Filtered, Compressible Soft Flask, 500Ml / 17Oz Lighten your load and drink right from the source. We took our go-to flask and added filtration to create a system that delivers hydration without contamination. The filter ? light and compact ? screws on top so you can drink right from the flask. Or ? if you?re carrying more water ? use the system to fill a bottle or reservoir. Care: Avoid freezing filter. Freezing may ruin the hollow fiber membrane. If in freezing conditions we recommend you keep the filter in your pocket or near your body to prevent freezing. *Effectively removes common waterborne bacteria, such as E.coli (99.999%) and parasitic cysts (99.9999%) per HSF 42. Included in the package: - UltraFlask+ 500ml Flask - 42MM Filter Flask Cap - Bite Valve - BackFlush Adapter - Filter Manual - Basic Care Use Instructions Specifications: - Capacity: 500 mL / 17 fl oz - Weight: 65 g / 2.3 oz - Dimensions: 240 mm x 70 mm / 9.4 in x 2.8 in - Material:TPU, Silicone POM, Hollow Fiber, ABS Product Features FAST SAFE FILTRATION: Included 42MM Filter Flask Cap removes 99.99% of E Coli Parasitic cysts. Filters approximately 1,500 liters of fresh water at a rate of 1 L per minute.* HYDRATION VEST COMPATIBLE: Fits easily in most hydration vests, belts or pack pockets. Provides bounce-free stability and a flexible flask shoulder to prevent chafing. COLLAPSIBLE FLASK: Soft material conforms to pockets, and shrinks as you drink to reduce movement and pack away easily when empty. INCLUDED BACKFLUSH ADAPTER: Plugs into filter valve and threads onto a HydraPak Stow or bottle of clean water for backflushing the filter to restore its flow rate. BEYOND LIFETIME WARRANTY: If you experience any issue, we?ll repair or replace the item for free. Whatever it takes to keep your adventure going. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!